Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen? each stage occurs in the mitochondria, but only the final stage produces atp. each stage produces atp, but only the third stage occurs in the mitochondria. each stage produces atp, but only the first stage occurs in the cytoplasm. each stage occurs in the cytoplasm, but only the final stage produces atp.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination